#!/usr/bin/env bash
# next/tests/http_projections.sh — Step 8c-proj acceptance test.
#
# Exercises GET /projections (list stub) and GET /projections/{name}
# via the shared match_prefix machinery. 11 cases.

set -uo pipefail
cd "$(git rev-parse --show-toplevel)"

SX_SERVER="${SX_SERVER:-hosts/ocaml/_build/default/bin/sx_server.exe}"
if [ ! -x "$SX_SERVER" ]; then
  SX_SERVER="/root/rose-ash/hosts/ocaml/_build/default/bin/sx_server.exe"
fi
if [ ! -x "$SX_SERVER" ]; then
  echo "ERROR: sx_server.exe not found." >&2
  exit 1
fi

VERBOSE="${1:-}"
PASS=0; FAIL=0; ERRORS=""
TMPFILE=$(mktemp); trap "rm -f $TMPFILE" EXIT

cat > "$TMPFILE" <<'EPOCHS'
(epoch 1)
(load "lib/erlang/tokenizer.sx")
(load "lib/erlang/parser.sx")
(load "lib/erlang/parser-core.sx")
(load "lib/erlang/parser-expr.sx")
(load "lib/erlang/parser-module.sx")
(load "lib/erlang/transpile.sx")
(load "lib/erlang/runtime.sx")
(load "lib/erlang/vm/dispatcher.sx")

(epoch 2)
(eval "(get (erlang-load-module (file-read \"next/kernel/http_server.erl\")) :name)")

;; projections_list_path is 12 bytes
(epoch 10)
(eval "(erlang-eval-ast \"byte_size(http_server:projections_list_path())\")")

;; projections_prefix is 13 bytes (adds trailing slash)
(epoch 11)
(eval "(erlang-eval-ast \"byte_size(http_server:projections_prefix())\")")

;; GET /projections -> 200 (list stub)
(epoch 12)
(eval "(get (erlang-eval-ast \"Req = [{method, <<71,69,84>>}, {path, http_server:projections_list_path()}], case http_server:route(Req) of [{status, 200} | _] -> ok; _ -> bad end\") :name)")

;; List body has 'projections: ' prefix
(epoch 13)
(eval "(get (erlang-eval-ast \"Req = [{method, <<71,69,84>>}, {path, http_server:projections_list_path()}], R = http_server:route(Req), case R of [_, _, {body, B}] -> http_server:match_prefix(<<112,114,111,106,101,99,116,105,111,110,115,58,32>>, B) =/= nomatch; _ -> false end\") :name)")

;; GET /projections/foo -> 200
(epoch 14)
(eval "(get (erlang-eval-ast \"Name = <<102,111,111>>, Req = [{method, <<71,69,84>>}, {path, <<(http_server:projections_prefix())/binary, Name/binary>>}], case http_server:route(Req) of [{status, 200} | _] -> ok; _ -> bad end\") :name)")

;; Projection body has 'projection: ' prefix (singular)
(epoch 15)
(eval "(get (erlang-eval-ast \"Name = <<102,111,111>>, Req = [{method, <<71,69,84>>}, {path, <<(http_server:projections_prefix())/binary, Name/binary>>}], R = http_server:route(Req), case R of [_, _, {body, B}] -> http_server:match_prefix(<<112,114,111,106,101,99,116,105,111,110,58,32>>, B) =/= nomatch; _ -> false end\") :name)")

;; GET /projections/ (empty name) -> 404
(epoch 16)
(eval "(get (erlang-eval-ast \"Req = [{method, <<71,69,84>>}, {path, http_server:projections_prefix()}], case http_server:route(Req) of [{status, 404} | _] -> ok; _ -> bad end\") :name)")

;; POST /projections -> 404
(epoch 17)
(eval "(get (erlang-eval-ast \"Req = [{method, <<80,79,83,84>>}, {path, http_server:projections_list_path()}], case http_server:route(Req) of [{status, 404} | _] -> ok; _ -> bad end\") :name)")

;; POST /projections/foo -> 404
(epoch 18)
(eval "(get (erlang-eval-ast \"Name = <<102,111,111>>, Req = [{method, <<80,79,83,84>>}, {path, <<(http_server:projections_prefix())/binary, Name/binary>>}], case http_server:route(Req) of [{status, 404} | _] -> ok; _ -> bad end\") :name)")

;; No collision: actors / artifacts / projections all return 200 simultaneously
(epoch 19)
(eval "(get (erlang-eval-ast \"R1 = http_server:route([{method, <<71,69,84>>}, {path, <<47,97,99,116,111,114,115,47,97>>}]), R2 = http_server:route([{method, <<71,69,84>>}, {path, <<(http_server:artifacts_prefix())/binary, 98>>}]), R3 = http_server:route([{method, <<71,69,84>>}, {path, <<(http_server:projections_prefix())/binary, 99>>}]), case {R1, R2, R3} of {[{status, 200} | _], [{status, 200} | _], [{status, 200} | _]} -> ok; _ -> bad end\") :name)")
EPOCHS

OUTPUT=$(timeout 60 "$SX_SERVER" < "$TMPFILE" 2>/dev/null)

check() {
  local epoch="$1" desc="$2" expected="$3"
  local actual
  actual=$(echo "$OUTPUT" | awk -v e="$epoch" '
    $0 ~ "^\\(ok-len " e " " { getline; print; exit }
    $0 ~ "^\\(ok " e " "     { print; exit }
    $0 ~ "^\\(error " e " "  { print; exit }
  ')
  [ -z "$actual" ] && actual="<no output for epoch $epoch>"
  if echo "$actual" | grep -qF -- "$expected"; then
    PASS=$((PASS+1))
    [ "$VERBOSE" = "-v" ] && echo "  ok $desc"
  else
    FAIL=$((FAIL+1))
    ERRORS+="  FAIL [$desc] (epoch $epoch) expected: $expected | actual: $actual
"
  fi
}

check  2  "module load name"                  "http_server"
check 10  "projections_list_path = 12"        "12"
check 11  "projections_prefix = 13"           "13"
check 12  "GET /projections -> 200"           "ok"
check 13  "list body 'projections: '"         "true"
check 14  "GET /projections/foo -> 200"       "ok"
check 15  "single body 'projection: '"        "true"
check 16  "GET /projections/ -> 404"          "ok"
check 17  "POST /projections -> 404"          "ok"
check 18  "POST /projections/foo -> 404"      "ok"
check 19  "all three /-routes 200"            "ok"

TOTAL=$((PASS+FAIL))
if [ $FAIL -eq 0 ]; then
  echo "ok $PASS/$TOTAL next/tests/http_projections.sh passed"
else
  echo "FAIL $PASS/$TOTAL passed, $FAIL failed:"
  echo "$ERRORS"
fi
[ $FAIL -eq 0 ]